Precision screw driver



FIG. 1 is a top front perspective view of a precision screw driver showing my new design;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a front view thereof.

The broken lines showings of the screw driver blade are for environmental purposes only and form no part of the claimed design. 

We claim the ornamental design for the precision screw driver, as shown. 